Compilare: user.cpp: In function 'int semn(std::pair<double, double>, std::pair<double, double>, std::pair<double, double>)': user.cpp:42: warning: control reaches end of non-void function user.cpp: In function 'void verifica(std::pair<double, double>, std::pair<double, double>)': user.cpp:104: warning: 'aux2' may be used uninitialized in this function user.cpp:104: warning: 'aux1' may be used uninitialized in this function user.cpp:104: warning: 'a2' may be used uninitialized in this function